Method and apparatus for working metal



18 .Sheets-Shei 1 Filed April 29, 1930 TINVENTOR George B. (58 BY ,8

TTORNEYS Dec. 13, 1932. d. B. COE

METHOD AND AP PAR'ATUS FOR WORKING METAL Filed April 29 1930 18 Sheets-Sheet 2 INVENTOR 680/923 3. (be

ATTORNEYS e.B. coE I gmndfl" AND APPARATUS FOR WORKING METAL Filed April 29. 1930 1a Sheets-Shee 5 INVENTOR 6eorge3. (be

ATTORNEYS 13-, 1932; G. B.- COE I METHOD AND APPARATUS FOR WORKING METAL 1a Shets-Sheet 4 Filed April 29. 1930 INVENTOR & 3. 60

Dec. 13, 1932. B, 1,890,803

v METHOD AND APPARATUS FOR WORKING METAL Filed April 29, 1930 a, Sheets-Sheet 5 ii 2M INVENTOR V r W ATTORNEYS Dec. 13, 1932. G. B. coE 1,890,803

METHOD AND APPARATUS FOR WORKING METAL Filed April 29, 1930 1 Sheets-Sheet e INVENTOR Geo 9631b? 130011 V BYewra/ ATTORNEYS Dec. 13, 1932. e. B. coE

METHOD AND APPARATUS FOR WORKING METAL Filed April 29, 1930 18 Sheets-Sheet 7 R w EM m mrfi m w m w @m @x \w mm W? .3 *w

Dec. 13, 1932. B E 1,890,803

METHOD AND APPARATUS FOR WORKING METAL Filed April 29, 1930 18 Sheets-Sheet 8 I I HIM! 55 53 um!!! [:i MIW 1 m1 q 1 54 55 .nHHH

INVENTOR GkorgeB. (be BY 'IHIIH ATTORNEYS Dec. 13, 1932. cog 1,890,803

METHOD AND APPARATUS FOR WORKING METAL Filed April 29, 1930 18 Sheets-Sheet 12 YH'U "will W I I" "WW I IIIIIIH" ll'lll ml...

INVENTOR George B. Cae

V :TTORN EYS Dec. 13, 1932; B. :05. 1,890,803

METHOD AND APPARATUS FOR WORKING METAL Filed April 29. 19:50 18 Sheets-Sheet 15 2229 V Z 221 r v 29? Z mmll INVENTOR GeargeBIpe V BYGMW i -011k,

ATTORNEYS Dec. 13, 1932. G. BLCoE 1,890,803

METHOD AND APPARATUS FOR WORKING METAL Filed Apr 112:9. 1930 1a Sheets-Sheet 14 6 gwczmoa eorge 0e BYW l r ATTORNEYS Dec. 13. 1932. G. B. (:01: 1,890,803

METHOD AND APPARATUS FOR WORKING METAL Filed April 29. 1930 18 Sheets-Sheet 15 4 'll um Illlllllllll] INVENTOR 6EOrg8 5. (0c

$1 VUZQWM ATTORN EYS Dec. 13, '1932. q 33 1,890,803

METHOD AND APPA RA'I'US FOR WORKING METAL Filed April 29, 1930 1a Sheets-Sheet l6 4 A N INVENTOR N George B. (be

\ V V I v w ATTORNEYS Dec. 13, 1932.. s. B. COE

METHOD AND APPARATUS FOR WORKING METAL Filed April 29. 1930 18 Sheets-Sheet l7 6 Bl Ng/FNTOR BY M, Va g ATTORN EYS Dec. 13, 1932. G. B. COE 1,890,803

ORKINGMETAL I tion with the reducing tools; to provide con- Patented Dec. 13, 1932 I UNITED STATES PATENT OFFICE GEORGE B. ODE, OF WATERBURY, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, TO TUBE REDUCING CORPORATION, OF WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE METHOD AND APPARATUS FOR WORKING METAL Application filed April 29,

- The present invention relates to an apparatus for and method of working metal, whereby the cross-sectional area of the metal stock acted upon. is reduced with an accompanying elongation of the stock; the object of the invention being to provide apparatus and method whereby the desired results may be accomplished in a practicable and eflicient manner without harmful action upon the metal.

The invention may find its most general application to the reduction of hollow or tubular stock and, therefore, a preferred embodiment of the invention particularly adapted to the reduction of tubular stock has been selected for purposes of illustration and description herein.

The present invention is particularly adapted towork metal in a cold state and provides for substantial wall reduction or reduction in size of tubular stock, or both reduction in wall and size, without deleterious effect upon the metal and without resort to frequent annealings.

The apparatus aims to provide smooth and efficient operation thus producing better stock and enhancing the life of the apparatus itself.

More specifically, the objects of the invention are: to improve thestools which act upon the. stock as well as the mounting for the tools, whereby they are made stronger, more accurate, and less subject to breakage or misadjustment; to control the movement of the stock by direct action thereon as well as by action upon the stock-supporting mandrel; to provide improved driving gear, insuring balanced and effective action; to provide improved stock guiding mechanism; to provide improved mandrel controlling means'which among other things secures longitudinal adjustment of the mandrel for better cooperavenient run-out mechanism for the finished stock; to provide for ready interchangeability' or adjustment of parts to accommodate different sizes of stock; to provide a bed which will readily accommodate different types of operating mechanism; and to provide various other desirable constructional 1930. Serial No. 448,222.

and operating features and advantages which will appear hereinafter.

The present invention will be described in connection with a selected illustrative embodiment thereof in apparatus shown in the accompanying drawings wherein:

Fig. 1 is a plan view of the reducing machine proper;

Fig. 1b is a continuation of Fig. 1, showing the run-out mechanism;

Fig. 2 is. a side elevation of Fig. 1;

Fig. 2b is a side elevation of Fig. 115;

Fig. 3 is a central vertical section of the rear end of the machine, part of the length being cut away;

Fig. 3?) is a continuation of Fig. 3 showing the front end of the machine and part of the run-out mechanism;

. Fig. 4 is a front end elevation;

Fig. 5 is a rear end elevation;

Fig. 6 is a transverse 'section taken on the line 6-6 of Fig. 3?), showing the reducing. rocker assembly;

Fig. 7 is a horizontal section taken on the line 77 of Fg. 6;

Fig. 8 is a side elevation, partly in section showing mechanism near the mid-front of the machine; Y i

Fig. 9 is a corresponding plan view;

Fig. 10 is a horizontal section on the line 1010 of Fig. 8;

Fig. 11 is atransverse the line 1111 of Fig. 9;

Fig. 12 is a transverse vertical section on the line 12-12 of Fig. 9; 85

Fig. 13 is a transverse vertical section on i the l'ne 1313 of Fig. 9;

Fig. 14 is a-transverse verticalsection on the line 14- 14 of Fig. 9;

Fig. 15 is a transverse vertical section on the line 15-15 of Fig. 9; 1

Fig. 16 is a side elevation of the tail stock;

Fig. 17 is a transverse vertical section on the line 17-17 of Fig. 16-;

Fig. 18 is a transverse vertical section on the line 1818 of Fig. 16;

Fig. 19 is an elevation of one unit of the run-out mechanism;

Fig. 20 is a horizontal section on the line 2020 of Fig. 19;

vertical section on Fig. 21 is a plan view of Fig. 19;

Fig. 22 is a horizontal section corresponding to Fig. 7 but showing a modified form of rocker; and

Fig. 23 is a similar view showing a preferred type of mandrel.

- The apparatus chosen for particular illustraton and description herein comprises, as shown in Figs. 1 and 2, the reducing machine proper and, Figs. 1b and 2b, run-out mechanism 30 especially adapted for use w'th the reducing machine. The reducing machine comprises a bed 31 which may be built as an integral unit or as an assembled unit of rig'd design, reducing mechanism 32, sock feeding and turning mechanism 34, driving mechanism 35, stock guiding mechanism 36, and mandrel holding and turning mechanism 37,

- somet'mes referred to as the tail stock.

Reducing mechanism The reducing mechanism 32 selected for illustration herein is of the type in which the working tools or reducing devices are mounted in a reciprocatory frame. It is shown in detail in F gs. 3b, 6 and 7. Normally the stock S is supported upon a mandrel M.

As shown particularly in Fig. 6 the bed 31 .is provided with guideways 40 for the reciprocatory frame or saddle l1. The ways .40 include horizontal supporting portions 40a and vertical portions 406. Gibs 42 bear against the vert'cal portions 40?) of the ways and upon the inclined surfaces of slides 43 formed on the saddle. The gibs 42 are pulled downward (see the left side of Fig. 6)

y cap screws 44 and are limted in their downward adjustment by set screws 45 provided with lock nuts 46. The gibs on opposite sides of the saddle provide adjustment in either d'rection'so that the saddle axis may be placed in the verLical plane of the longitudinal axis of the machine along which the stock moves. Th's obviates whipping action of the stock which would tend to break the mandrel. The glbs of course also take up for wear.

The saddle is reciprocated by connecting rods 47 connected at each s'de to the saddle by wrisi' pins 48. The axes of the wrist pins are in alignment and pass through the longitudinal axis of the machine along which the stock moves. By this arrangement the dr ving movement is imparted to the saddle in an even manner without undue twist, b'nding in the ways or whipping of he stock. The connecting rods as shown in Fig. 2 are relatively long so that the angle of movement of the connecting rods caused by the crankpin motion w'll be relatively small.

The saddle is formed as a single cast box of extremely strong metal in order to lim't expansion as much as possible under heavy work. The box comprises sides 41a, bot'om 41b and ends 410, the ends having aligned apertures 41d for the passageof stock of the largest size to be reduced. This shape gives great strength and rigidity to the saddle yet leaves the top open for quick access to parts dis osed therein.

caring blocks 50 placed in sutable guides 51 are adjustable toward and from the longitudinal central axis of the machine by adjusting devices in the form of wedges 52. The wedges are positively moved in either direction by horizontally disposed adjusting reducing devices which are directly behind the stock thus avoiding shaft spring which would exist if projecting shafts were employed. The reducing devices employed are broadly of the segmental roll type and more specifically of the oscillating roll or rocker type. This includes either devices which have a small rocking movement or those which have a great rocking movement, say as much as a complete turn (360 In either case the actual working surface will have a gap of suflicient length to release the stock.

The reducing devices shown in Figures 3?), 6 and 7 are of the first type having a limited rocking movement. They comprise journal members 56 provided with horizontal bases 57 carrying radial keys 58 and supporting swaging sectors or rocker dies 59. The rocker dies are thus'replaceable for different sizes of stock or other purposes. The dies are held to the horizontal bases 57 by cap bolts 60 threaded into the bases but fitting in oversized holes in the sectors.

A slight adjustment may be given the dies by wedges 61 moved by adjusting screws 62 threaded in the wedges and having shoulders bearing respectively against the bases 57 and cap plates 63. The plates 63 are rigidly retained on the journal members 56 by screws v64. Whereas the wedges 52 adjust the whole rocker as emblies from either side to make them work accurately on the vertical plane through the longitudinal axis of the machine along which the stock moves, the wedges 61 adjust the radial distance from the working faces of the d es to the axis of oscillation so that the effective radius of both dies of the pair (or all of a set, if more than two) will I be the same, or a different radius it may be, if de ired for any reason.

The entire assembly of mechanism is re 

